<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色 -->
            <el-row>
                <el-col>
                    <el-button
                        type="primary"
                        @click="addDialogVisible=true"
                    >添加角色</el-button>
                </el-col>
            </el-row>
            <el-table
                :data="rolesList"
                border
                stripe
            >
                <!-- 展开行 -->
                <el-table-column
                    type="expand"
                    label="明细"
                >
                    <template slot-scope="scope">
                        <el-row
                            v-for="(item1, i1) in scope.row.children"
                            :key="item1.id"
                            :class="{bdbottom:true,bdtop:i1===0,vcenter:true}"
                        >
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag
                                    closable
                                    @close="removeRightById(scope.row,item1.id)"
                                >{{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="19">
                                <el-row
                                    v-for="(item2, i2) in item1.children"
                                    :key="item2.id"
                                    :class="{bdtop:i2!=0,vcenter:true}"
                                >
                                    <!-- 渲染二级权限 -->
                                    <el-col :span="6">
                                        <el-tag
                                            type="success"
                                            closable
                                            @close="removeRightById(scope.row,item2.id)"
                                        >{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <!-- 渲染三级权限 -->
                                    <el-col :span="18">
                                        <el-tag
                                            type="warning"
                                            closable
                                            v-for="item3 in item2.children"
                                            :key="item3.id"
                                            @close="removeRightById(scope.row,item3.id)"
                                        >{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column
                    type="index"
                    label="序号"
                    align="center"
                ></el-table-column>
                <el-table-column
                    prop="roleName"
                    label="角色名称"
                    align="center"
                >
                </el-table-column>
                <el-table-column
                    prop="roleDesc"
                    label="角色描述"
                    align="center"
                ></el-table-column>
                <el-table-column
                    label="操作"
                    align="center"
                    width="300"
                >
                    <template slot-scope="scope">
                        <el-button
                            type="primary"
                            icon="el-icon-edit"
                            size="mini"
                            @click="showEditDialog(scope.row.id)"
                        >编辑</el-button>
                        <el-button
                            type="danger"
                            icon="el-icon-delete"
                            size="mini"
                            @click="removeRoleById(scope.row.id)"
                        >删除</el-button>
                        <el-button
                            type="warning"
                            icon="el-icon-setting"
                            size="mini"
                            @click="showRightDialog(scope.row)"
                        >分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色的对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addDialogClosed"
        >
            <el-form
                :model="addForm"
                :rules="addFormRules"
                ref="addFormRef"
                label-width="100px"
            >
                <el-form-item
                    label="角色名称"
                    prop="roleName"
                >
                    <el-input v-model="addForm.roleName" class="w100"></el-input>
                </el-form-item>

                <el-form-item
                    label="角色描述"
                    prop="roleDesc"
                >
                    <el-input v-model="addForm.roleDesc" class="w100"></el-input>
                </el-form-item>

            </el-form>
            <span
                slot="footer"
                class="dialog-footer"
            >
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button
                    type="primary"
                    @click="addRole"
                >确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改角色的对话框 -->
        <el-dialog
            title="修改角色"
            :visible.sync="editDialogVisible"
            width="50%"
            @close="editDialogClosed"
        >
            <el-form
                :model="editForm"
                :rules="editFormRules"
                ref="editFormRef"
                label-width="100px"
            >
                <el-form-item
                    label="角色名称"
                    prop="roleName"
                >
                    <el-input v-model="editForm.roleName" class="w100"></el-input>
                </el-form-item>

                <el-form-item
                    label="角色描述"
                    prop="roleDesc"
                >
                    <el-input v-model="editForm.roleDesc" class="w100"></el-input>
                </el-form-item>

            </el-form>
            <span
                slot="footer"
                class="dialog-footer"
            >
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button
                    type="primary"
                    @click="allotRights"
                >确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限的对话框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="rightDialogVisible"
            width="50%"
            @close="rightDialogClosed"
        >
            <!-- tree树形控制 -->
            <el-tree
                :data="rightsList"
                show-checkbox
                node-key="id"
                :props="treeProps"
                default-expand-all
                :default-checked-keys="defaultKeys"
                ref="treeRef"
            >
            </el-tree>
            <span
                slot="footer"
                class="dialog-footer"
            >
                <el-button @click="rightDialogVisible = false">取 消</el-button>
                <el-button
                    type="primary"
                    @click="allotRights"
                >确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data() {
        return {
            // 获取权限列表
            rolesList: [],
            // 分配权限的对话框的显示和隐藏
            rightDialogVisible: false,
            // 获取权限列表
            rightsList: [],
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点id的数组,角色默认具有的权限
            defaultKeys: [],
            // 添加角色的对话框的显示和隐藏
            addDialogVisible: false,
            // 添加角色的表单对象
            addForm: {
                roleName: '',
                roleDesc: '',
            },
            // 添加角色的校验规则
            addFormRules: {
                roleName: [
                    { required: true, message: '请输入角色名', trigger: 'blur' },
                    // { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                    // { min: 6, max: 14, message: '长度在 6 到 14 个字符', trigger: 'blur' }
                ],
            },
            // 修改角色对话框的显示和隐藏
            editDialogVisible: false,
            // 修改角色的表单对象
            editForm: {},
            // 修改角色的校验规则
            editFormRules: {
                roleName: [
                    { required: true, message: '请输入角色名', trigger: 'blur' },
                    // { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                    // { min: 6, max: 14, message: '长度在 6 到 14 个字符', trigger: 'blur' }
                ],
            },
            // 角色id
            roleId: ''
        }
    },
    created() {
        // 获取角色列表数据
        this.getRolesList();
    },
    methods: {
        // 获取角色列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles');
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败');
            }
            this.rolesList = res.data;
        },
        // 删除角色下指定的权限
        removeRightById(role, rightId) {
            this.$confirm('确定要删除该权限吗?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(async () => {
                const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
                if (res.meta.status !== 200) {
                    return this.$message.error('删除权限失败');
                }
                // this.getRolesList(); //不建议重新获取所有角色列表，会导致页面刷新
                role.children = res.data; //重新设置当前角色下的指定权限
                this.$message.success('删除权限成功');
            }).catch(() => {
                this.$message.info('已取消删除');
            });
        },
        // 获取权限
        async showRightDialog(role) {
            // 获取权限列表
            const { data: res } = await this.$http.get(`rights/tree`);
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限列表失败');
            }
            this.rightsList = res.data;
            // 获取所有三级权限的id
            this.getLeafKeys(role, this.defaultKeys);
            // 存储当前要分配权限的角色id
            this.roleId = role.id;
            this.rightDialogVisible = true
        },
        // 获得角色下所有三级权限的id
        getLeafKeys(node, arr) {
            // 判断是否为三级权限
            if (!node.children) {
                return arr.push(node.id);
            }
            // 如果不是三级权限，则递归操作
            node.children.forEach(item => {
                this.getLeafKeys(item, arr);
            });
        },
        // 监听分配权限的对话框的关闭
        rightDialogClosed() {
            this.defaultKeys = [];
        },
        // 添加角色
        addRole() {
            // 判断表单校验是否成功
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) {
                    return;
                }
                // 发送请求判断是否添加角色成功
                const { data: res } = await this.$http.post('roles', this.addForm) //直接返回执行的结果
                if (res.meta.status !== 201) {
                    return this.$message.error('添加角色失败');
                }
                // 关闭对话框
                this.addDialogVisible = false;
                // 刷新角色列表
                this.getRolesList();
                this.$message.success('添加角色成功');
            })
        },
        // 监听添加角色的对话框的关闭
        addDialogClosed() {
            this.$refs.addFormRef.resetFields();
        },
        // 获取角色
        async showEditDialog(id) {
            const { data: res } = await this.$http.get(`roles/${id}`);
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色信息失败');
            }
            this.editForm = res.data;
            // 打开对话框
            this.editDialogVisible = true
        },
        // 修改角色
        editRole() {
            // 判断表单校验是否成功
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) {
                    return;
                }
                // 发送请求判断是否修改角色成功
                // put请求和post请求一样，get请求和delete请求一样
                const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, {
                    roleName: this.editForm.roleName,
                    roleDesc: this.editForm.roleDesc
                }) //直接返回执行的结果
                if (res.meta.status !== 200) {
                    return this.$message.error('修改角色失败');
                }
                // 关闭对话框
                this.editDialogVisible = false;
                // 刷新角色列表
                this.getRolesList();
                this.$message.success('修改角色成功');
            })
        },
        // 监听修改角色的对话框的关闭
        editDialogClosed() {
            this.$refs.editFormRef.resetFields();
        },
        // 删除角色
        removeRoleById(id) {
            this.$confirm('确定要删除该用户吗?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(async () => {
                const { data: res } = await this.$http.delete(`roles/${id}`);
                if (res.meta.status !== 200) {
                    return this.$message.error('删除角色失败');
                }
                this.getRolesList();
                this.$message.success('删除角色成功');
            }).catch(() => {
                this.$message.info('已取消删除');
            });
        },
        // 分配权限
        async allotRights() {
            // 获取所有选中的权限节点的key数组
            // const keys =this.$refs.treeRef.getCheckedKeys().concat(this.$refs.treeRef.getHalfCheckedKeys())
            const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()];
            const idStr = keys.join(',');
            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr }) //直接返回执行的结果
            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败');
            }
            this.$message.success('分配权限成功');
            this.getRolesList();
            this.rightDialogVisible = false;
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 6px;
}
.bdbottom {
    border-bottom: 1px solid #eee;
}
.bdtop {
    border-top: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>